4-(1-ethoxy-ethyliden)-2-ethylmercapto-4
H-thiazol-5-one 、
[5-(1-ethylmercapto-2-{4-[(3-ethyl-thiazolidin-2-yliden)-ethylidene]-3-methyl-5-oxo-thiazolidin-2-yliden}-ethyliden)-4-oxo-2-thioxo-thiazolidin-3-yl]-acetic acid ethyl ester 生成 (2-[2-ethoxy-2-(2-ethylmercapto-5-oxo-thiazol-4-yliden)-ethyliden]-5-(1-ethylmercapto-2-{4-[(3-ethyl-thiazolidin-2-yliden)-ethylidene]-3-methyl-5-oxo-thiazolidin-2-yliden}-ethyliden)-4-oxo-thiazolidin-3-yl]-acetic acid ethyl ester